<template>
  <div>
    <nav-bar>
      <div slot="left" @click="backClick">
        <div class="back-icon"></div>
      </div>
      <div slot="center" class="title">
        <div
          v-for="(item, index) in titles"
          :key="index"
          class="title-item"
          :class="{ active: index === currentIndex }"
          @click="titleClick(index)"
        >
          {{ item }}
        </div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
import NavBar from "../../../components/common/navbar/NavBar.vue";
export default {
  components: {
    NavBar,
  },
  name: "DetailNavBar",
  data() {
    return {
      titles: ["商品", "参数", "评论", "推荐"],
      currentIndex: 0,
    };
  },
  methods: {
    titleClick(index) {
      this.currentIndex = index;
      this.$emit("titleClick", index);
    },
    backClick() {
      this.$router.back();
    },
  },
};
</script>

<style scoped>
.title {
  display: flex;
  font: 13px;
}
.title-item {
  flex: 1;
}
.active {
  color: var(--color-high-text);
}
.back-icon {
  margin: 15px 0 0 15px;
  content: "";
  display: inline-block;
  height: 15px;
  width: 15px;
  border-width: 0 0 2px 2px;
  border-color: #666;
  border-style: solid;
  transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
  -webkit-transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
}
</style>
